Microwave spectroscopic observation of distinct electron solid phases in wide quantum wells

Abstract

In high magnetic fields ($B$), two dimensional electron systems (2DESs) can form a number of phases in which interelectron repulsion plays the central role, since the kinetic energy is frozen out by Landau quantization. These phases include the well-known liquids of the fractional quantum Hall effect (FQHE), as well as solid phases with broken spatial symmetry and crystalline order. Solids can occur at the low Landau filling ($\nu$) termination of the FQHE series, but also within integer quantum Hall effects (IQHEs). Here, we present microwave spectroscopy studies of wide quantum wells (WQWs). The spectra clearly reveal two distinct solid phases, hidden within what in dc transport would be the zero diagonal conductivity of an integer quantum Hall effect state. Explanation of these solids is not possible with the simple picture of a Wigner solid (WS) of ordinary (quasi) electrons or holes.

References in corpus (2)

• Microwave Resonance of 2D Wigner Crystal around integer Landau fillings
• Evidence for Two Different Solid Phases of Two Dimensional Electrons in High Magnetic Fields

Cited by in corpus (15)

• Transport in two-dimensional modulation doped semiconductor structures
• Fractional Quantum Hall Effect and Wigner Crystal of Two-Flux Composite Fermions
• Fractional quantum Hall states versus Wigner crystals in wide quantum wells in the half-filled lowest and second Landau levels
• Microwave spectroscopic studies of the bilayer electron solid states at low Landau filling in a wide quantum well
• Crossover between localized states and pinned Wigner crystal in high-mobility n-GaAs/AlGaAs heterostructures near filling factor $\nu =1$
• Electron-solid and electron-liquid phases in graphene
• Microwave spectroscopic observation of a Wigner solid within the 1/2 fractional quantum Hall effect
• Magnetotransport patterns of collective localization near $\nu =1$ in a high-mobility two-dimensional electron gas
• Analytical Theory of Strongly Correlated Wigner Crystals in the Lowest Landau Level
• Capacitive Response of Wigner Crystals at the Quantum Hall Plateau
• Exotic Bilayer Crystals in a Strong Magnetic Field
• Density Dependence of the Phases of the $\nu =1$ Integer Quantum Hall Plateau in Low Disorder Electron Gases
• Wigner solids of wide quantum wells near Landau filling $\nu =1$
• Inequivalence of the low-density insulating state and quantum Hall insulating states in a strongly correlated two-dimensional electron system
• Quantum Wigner solid in two-dimensional electron systems in semiconductors